Syringe



0. 0. R. SCH'WIDEIZKY.

SYRINGE,

APPLICATION FILED NOV. 2,19I7.

Patented Aug. 10, 1920.

WITNESSES UNITED STATES PATENT OFFICE.

OSCAR O. R. SCHWIDETZKY, OF HASBROUCK HEIGHTS, NEW JERSEY, ASSIGN'OR TO IBECKTON, DICKINSON 8c (30., 0F RUTHERFORD, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SYRING-E.

Application filed November 2, 1917.

To all whom it may concern.-

Be it known that I, Oscar: O. R. SCI-IWI- nn'rznr, a citizen of the United States, and a resident of Hasbrouck Heights, in the county of Bergen and State of New Jersey, have invented a new and Improved Syringe, of which. the following is a full, clear, and exact description.

The invention relates to syringes consisting of a glass barrel and a rubber bulb for drawing a liquid into the barrel and ejecting it through the nozzle thereof.

The object of the invention is to provide a new and improved syringe of the type mentioned, arranged to permit of securely fastening the bulb to the barrel and to pre vent the liquid drawn into the barrel from flowing into the bulb on inclining the syringe with the nozzle upward.

In order to accomplish the desired result, use is made of a barrel provided at one end with a discharge nozzle and at the opposite end with a wall and with a nipple, the wall having a minute air passage therethrough to connect the barrel with the nipple, and a bulb having a neck fitting exteriorly on the said nipple, the air in the bulb and the said wall forming a support for a body of liquid held within the barrel and the said minute air passage preventing the passage of the liquid from the barrel into the nipple and bulb upon inclining the syringe with the nozzle upward.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in both views.

Figure 1 is a sectional side elevation of the syringe with the nozzle end of the barrel shown in elevation and with the liquid drawn into the barrel; and r Fig. 2 is a sectional side elevation of the same with the nozzle pointing upward.

The barrel 10 of the syringe is preferably made of glass and is provided at one end with a contracted nozzle 11 and at the other end with an integral wall 12 from which extends integrallya nipple 13 engaged exteriorly by the neck 14: of a rubber bulb 15. The wall 12 is provided with a minute air passage 16 connecting the interior of the barrel 10 with the interior of the nipple 13, which latter is provided with an opening 17 specification of Letters Patent.

Patented Aug. 10, 1920.

Serial No. 199,906.

opening into the rubber bulb 15. The nipple 13 is preferably bulbous, as plainly indicated in the drawings, and the neck 14: fits snugly onto the nipple so as to securely hold the bulb 15 in position on the nipple 13. It will be noticed that if the filled syringe is held with the nozzle 11 upward, as shown in Fig. 2, the minute air passage 16 prevents escape of air from the bulb 15 and the liquid column is sustained partly by the wall 12 and partly by the air within the bulb 15; and the air in the bulb prevents the liquid from entering it. By the arrangement described the liquid does not come in contact with the rubber bulb. The glass barrel 10 can be readily cleaned and sterilized whenever needed. When the bulb is fully inflated the air therein is sufficient to displace the contents of the barrel 10 on deflating the bulb by collapsing it.

It is understood that when using the syringe, the nozzle 11 is immersed in the liquid after the bulb 15 has been squeezed, and then on releasing the bulb the liquid is drawn into the barrel 10, as indicated in Fig. 1. The user can now turn the syringe upside down or into any inclined position without danger of the liquid flowing through the small aperture 16 into the nipple 13 and the bulb 15. As the syringe is held but temporarily in this position for application to an afflicted part on the subsequent pressing of the bulb 15 for ejecting the liquid, it is evident that the liquid has i not sufiicient time to pass from the barrel 10 into the bulb 15 especially as a large sup porting surface is provided by the wall 12, and the air within the bulb 15 as above ex plained.

It will also be noticed that the neck 14 of the bulb '15 is securely held in position on the bulbous nipple 13 to prevent accidental disconnection of the barrel and the bulb.

It is further understood that the air passages 16 and 17 permit the air to flow readily into and out of the bulb 15 without danger of the liquid passing into the bulb.

It is further understood that many medicated and other liquids, in case they should pass into the bulb, have a deteriorating infiuence on the rubber material, and hence the life of such bulbs is shortened, but through the improved syringe, as described, the rubber material of the bulb is not liable to deteriorate as it is practically kept free of the liquid.

Having thus described my invention, I claim as new and desire to secure by Letters Patent V 1. A syringe, comprising a barrel provided at one end with a discharge nozzle and at the opposite end with a transverse wall having a minute air aperture open at all times, a nipple formed integrally on the outer face of the wall and into which opens the said minute aperture, the nipple having a bulbous portion, and a rubber bulb having a neck fitting exteriorly on the said nipple, the air in the bulb and the said wall forming a support for a body of liquid held within the barrel and preventing passage of the liquid from the barrelinto the nipple and bulb upon inclining the syringe with the nozzle upward.

2. A syringe, comprising a barrel of glass or like material, with a discharge nozzle; a nipple of lesser diameter than the barrel to provide an internal shoulder contacted by and supporting the liquid when the syringe is inverted, the nipple having a minute orifice and merging into an enlargement; and a rubber or like bulb, with a neck held on the nipple and in abutment with the shoulder by the enlargement, both externally to avoid contact of the liquid with any portion of the bulb.

OSCAR O. R; SCHWIDETZKY. 

